The Form W-4, Employee's Withholding Certificate was redesigned in 2020, due to the Tax Cuts and Jobs Act (TCJA) of 2017. The new form considers all sources of income, including multiple jobs or a spouse's income to determine the correct tax withholding amount. The Form does include a line for Extra withholding.
If you and your husband have not updated your W-4 recently, you may want to consider doing so. The IRS has an online tool to help employees accurately calculate their withholding. IRS Tax Withholding Estimator
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